\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/algebra omserver.spad}
\author{Vilya Harvey}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
\section{package OMSERVER OpenMathServerPackage}
<<package OMSERVER OpenMathServerPackage>>=
)abbrev package OMSERVER OpenMathServerPackage
++ Author: Vilya Harvey
++ Date Created:
++ Date Last Updated:
++ Basic Functions:
++ Related Constructors:
++ Also See:
++ AMS Classifications:
++ Keywords:
++ References:
++ Description: \spadtype{OpenMathServerPackage} provides the necessary
++ operations to run AXIOM as an OpenMath server, reading/writing objects
++ to/from a port.  Please note the facilities available here are very basic.
++ The idea is that a user calls e.g. \axiom{Omserve(4000,60)} and then
++ another process sends OpenMath objects to port 4000 and reads the result.

OpenMathServerPackage(): with
  OMreceive : OpenMathConnection -> Any
  ++ OMreceive(c) reads an OpenMath object from connection \axiom{c} and
  ++ returns the appropriate AXIOM object.
  OMsend    : (OpenMathConnection, Any) -> Void
  ++ OMsend(c,u) attempts to output \axiom{u} on \aciom{c} in OpenMath.
  OMserve   : (SingleInteger, SingleInteger) -> Void
  ++ OMserve(portnum,timeout) puts AXIOM into server mode on port number
  ++ \axiom{portnum}.  The parameter \axiom{timeout} specifies the timeout
  ++ period for the connection.
 == add
  import OpenMathDevice
  import OpenMathConnection
  import OpenMathPackage
  import OpenMath



  OMreceive(conn: OpenMathConnection): Any ==
    dev: OpenMathDevice := OMconnInDevice(conn)
    OMsetEncoding(dev, OMencodingUnknown);
    OMread(dev)

  OMsend(conn: OpenMathConnection, value: Any): Void ==
    dev: OpenMathDevice := OMconnOutDevice(conn)
    OMsetEncoding(dev, OMencodingXML);
    --retractable?(value)$AnyFunctions1(Expression Integer) =>
    --  OMwrite(dev, retract(value)$AnyFunctions1(Expression Integer), true)
    retractable?(value)$AnyFunctions1(Integer) =>
      OMwrite(dev, retract(value)$AnyFunctions1(Integer), true)
    retractable?(value)$AnyFunctions1(Float) =>
      OMwrite(dev, retract(value)$AnyFunctions1(Float), true)
    retractable?(value)$AnyFunctions1(SingleInteger) =>
      OMwrite(dev, retract(value)$AnyFunctions1(SingleInteger), true)
    retractable?(value)$AnyFunctions1(DoubleFloat) =>
      OMwrite(dev, retract(value)$AnyFunctions1(DoubleFloat), true)
    retractable?(value)$AnyFunctions1(String) =>
      OMwrite(dev, retract(value)$AnyFunctions1(String), true)

  OMserve(portNum: SingleInteger, timeout: SingleInteger): Void ==
    conn: OpenMathConnection := OMmakeConn(timeout)
    OMbindTCP(conn, portNum)
    val: Any
    while true repeat
      val := OMreceive(conn)
      OMsend(conn, val)

@
\section{License}
<<license>>=
--Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
--All rights reserved.
--
--Redistribution and use in source and binary forms, with or without
--modification, are permitted provided that the following conditions are
--met:
--
--    - Redistributions of source code must retain the above copyright
--      notice, this list of conditions and the following disclaimer.
--
--    - Redistributions in binary form must reproduce the above copyright
--      notice, this list of conditions and the following disclaimer in
--      the documentation and/or other materials provided with the
--      distribution.
--
--    - Neither the name of The Numerical ALgorithms Group Ltd. nor the
--      names of its contributors may be used to endorse or promote products
--      derived from this software without specific prior written permission.
--
--THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
--IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
--TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
--PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
--OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
--EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
--PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
--PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
--LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
--NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
--SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@
<<*>>=
<<license>>

<<package OMSERVER OpenMathServerPackage>>
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}